QAgentRT.dll.mui: How to Fix, Download, and Update

Last Updated: 11/26/2023
[Average Read Time: 4.5 minutes]

MUI files such as QAgentRT.dll.mui are categorized as Win32 DLL (Dynamic link library) files. As a Quarantine Agent Service Run-Time file, it was created for use in Microsoft® Windows® Operating System by Microsoft.

The release of QAgentRT.dll.mui introduced for Windows was on 11/08/2006 in Windows Vista. The most recent version [file version 6.3.9600.16384 (winblue_rtm.130821-1623)] was introduced on 10/18/2013 for Windows 8.1. QAgentRT.dll.mui is found in Windows Vista, Windows 8.1, and Windows 8.

In this short article, you will discover detailed file information, steps for troubleshooting MUI file problems with QAgentRT.dll.mui, and list of free downloads for every version that exists in our comprehensive file directory.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	QAgentRT.dll.mui
File Extension:	MUI file extension
Description:	Quarantine Agent Service Run-Time
Object File Type:	Dynamic link library
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Microsoft Corporation
Software Program:	Microsoft® Windows® Operating System
Legal Copyright:	© Microsoft Corporation. All rights reserved.

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x0000

View Other QAgentRT.dll.mui Information

File Info	Description
File Size:	22 kB
File Modification Date/Time:	2014:11:21 06:16:37+00:00
File Inode Change Date/Time:	2017:11:05 07:04:30+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	0000:00:00 00:00:00
PE Type:	PE32
Linker Version:	11.0
Code Size:	0
Initialized Data Size:	21504
Uninitialized Data Size:	0
Entry Point:	0x0000
OS Version:	6.3
Image Version:	6.3
Subsystem Version:	6.0
Subsystem:	Windows GUI
File Version Number:	6.3.9600.16384
Product Version Number:	6.3.9600.16384
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Quarantine Agent Service Run-Time
File Version:	6.3.9600.16384 (winblue_rtm.130821-1623)
Internal Name:	QAgentRT.DLL
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	QAgentRT.DLL.MUI
Product Name:	Microsoft® Windows® Operating System
Product Version:	6.3.9600.16384

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are QAgentRT.dll.mui Error Messages?

Dynamic Link Library QAgentRT.dll.mui Errors

QAgentRT.dll.mui is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like QAgentRT.dll.mui, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like sapisvr.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same QAgentRT.dll.mui file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared MUI file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when QAgentRT.dll.mui is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common QAgentRT.dll.mui errors include:

Access Violation at address - QAgentRT.dll.mui.
QAgentRT.dll.mui could not be found.
Cannot find C:\Windows\System32\en-US\QAgentRT.dll.mui.
Cannot register QAgentRT.dll.mui.
Cannot start Windows. A required component is missing: QAgentRT.dll.mui. Please install Windows again.
Failed to load QAgentRT.dll.mui.
The application has failed to start because QAgentRT.dll.mui was not found.
The file QAgentRT.dll.mui is missing or corrupt.
This application failed to start because QAgentRT.dll.mui was not found. Re-installing the application may fix this problem.

Your QAgentRT.dll.mui file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Windows), or deleted by a malware infection. Furthermore, QAgentRT.dll.mui file corruption could be caused from a power outage when loading Windows, system crash while loading QAgentRT.dll.mui, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix QAgentRT.dll.mui Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your QAgentRT.dll.mui issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
When you see the search box, type "System Restore" and press "ENTER".
In the search results, find and click System Restore.
Please enter the administrator password (if applicable / prompted).
Follow the steps in the System Restore Wizard to choose a relevant restore point.
Restore your computer to that backup image.

If the Step 1 fails to resolve the QAgentRT.dll.mui error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing QAgentRT.dll.mui file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt QAgentRT.dll.mui files (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "cmd" but DO NOT PRESS "ENTER".
Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
You'll be prompted with a permission dialog box.
In the box, click "YES".
You should have a black screen with a blinking cursor.
In that black screen, type "sfc /scannow" and hit "ENTER".
SFC will begin scanning for QAgentRT.dll.mui issues and any other system file problems.
Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

If this Step 2 fails as well, please proceed to the Step 3 below.

sfc /scannow

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many QAgentRT.dll.mui error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

Hit the Windows Start button
In the search box, type "Update" and press "ENTER".
In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
If updates are available for download, click "Install Updates".
After the update is completed, restart your PC.

If Windows Update failed to resolve the QAgentRT.dll.mui error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your QAgentRT.dll.mui File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate QAgentRT.dll.mui file version. We maintain a comprehensive database of 100% malware-free QAgentRT.dll.mui files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download QAgentRT.dll.mui Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy the file into the appropriate directory for your Windows version:

Windows Vista: C:\Windows\System32\en-US\
Windows Vista: C:\Windows\SysWOW64\en-US\
Windows 7: C:\Windows\SysWOW64\en-US\
Windows 7: C:\Windows\System32\en-US\
Windows 8: C:\Windows\System32\en-US\
Show 1 more directory +

Windows 8.1: C:\Windows\System32\en-US\

Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 8.1.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve QAgentRT.dll.mui problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download QAgentRT.dll.mui Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying QAgentRT.dll.mui to your appropriate Windows system directory. Microsoft typically does not release Windows MUI files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing QAgentRT.dll.mui and all other MUI files for Windows. An incorrectly installed MUI file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows Vista

File Name

Software Version

File Version

Architecture

QAgentRT.dll.mui

6.0.6001.18000

6.0.6001.18000 (longhorn_rtm.080118-1840)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
Software:	Microsoft® Windows® Operating System
Software Version:	6.0.6001.18000
File Version:	6.0.6001.18000 (longhorn_rtm.080118-1840)
File Size:	18432
File Date:	01/21/2008
MD5 Checksum:	bf987879af639eab250850b10fd87d08
SHA1 Checksum:	159dbf34a20082d5fd2f701f0867089ec0f4f776
SHA256 Checksum:	11bc16bf64fccd3482ca0e4a14869130582e21c0226e6b0b7d8199c3d2924160
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.0
Initialized Data Size:	17920
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	01/21/2008

QAgentRT.dll.mui

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	18944
MD5 Checksum:	18e426a7fff0b1cf19ee7089ba1d04e6
SHA1 Checksum:	312efc6603c94307ef67962ed935705e6a8aeb0c
SHA256 Checksum:	0e0fe0d078251f4b59391b64ced33e12ca27df0f4ea071960dfcb0e423dddfee
CRC32:
File Directory Location:	C:\Windows\SysWOW64\en-US\

File Version, System, and Machine Information
There is no information available.

Windows 8.1

File Name

Software Version

File Version

Architecture

QAgentRT.dll.mui

6.3.9600.16384

6.3.9600.16384 (winblue_rtm.130821-1623)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft® Windows® Operating System
Software Version:	6.3.9600.16384
File Version:	6.3.9600.16384 (winblue_rtm.130821-1623)
File Size:	22016
File Date:	11/21/2014
MD5 Checksum:	abd14e6e9b751c0f8f89129cb9a0fe99
SHA1 Checksum:	740d21a8a0592a9b6d8f8e44db1c54a7a04ab79a
SHA256 Checksum:	ae20e2cf1fb4324d895eb77408e1ee79009329ecb64a190160eca19458f8f0ef
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.3
Initialized Data Size:	21504
Linker Version:	11.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	6.0
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

QAgentRT.dll.mui

6.2.9200.16384

6.2.9200.16384 (win8_rtm.120725-1247)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	Microsoft® Windows® Operating System
Software Version:	6.2.9200.16384
File Version:	6.2.9200.16384 (win8_rtm.120725-1247)
File Size:	22016
File Date:	07/26/2012
MD5 Checksum:	081ea664defb21a7a02eb6f8bc776a63
SHA1 Checksum:	966e27bbe2fa820bf6f3b278dafb4b72bc63f1db
SHA256 Checksum:	4ee8a47ea52a4fbec55b8fae2fd5c77244bebc81ded3d03b3836672e7da42d53
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.2
Initialized Data Size:	21504
Linker Version:	10.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.1
File Modification Date/Time:	07/26/2012

Windows 7

File Name

Software Version

File Version

Architecture

QAgentRT.dll.mui

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
File Size:	22016
MD5 Checksum:	cc6975cac67b3112c8059a64713bf232
SHA1 Checksum:	d60f9c01c418331feb2f02327457b4a8c8c7ad40
SHA256 Checksum:	8f8b0384e2e2e719bdc1b10f1bbc1331e97504ec26e5ff3e2a3e7a233bbcc59b
CRC32:
File Directory Location:	C:\Windows\SysWOW64\en-US\

File Version, System, and Machine Information
There is no information available.

QAgentRT.dll.mui

6.1.7600.16385

6.1.7600.16385 (win7_rtm.090713-1255)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Microsoft® Windows® Operating System
Software Version:	6.1.7600.16385
File Version:	6.1.7600.16385 (win7_rtm.090713-1255)
File Size:	22016
File Date:	04/12/2011
MD5 Checksum:	8634f4b71e2bdf14661fcdb21c2f42e5
SHA1 Checksum:	2e7b39fddee6a9dd8cc96d97e4bdaae55e1db4db
SHA256 Checksum:	0b6284a17a4a1ca0ead0a57854c308c621466171b20c9f7b40369e54b6a30355
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.1
Initialized Data Size:	21504
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	04/12/2011

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Files Related to QAgentRT.dll.mui

MUI Files Related to QAgentRT.dll.mui

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
bg-BG_BitLockerToGo.ex...	BitLocker To Go Reader	Операционна система Microsoft® Windows® (6.3.9600.16384)	8704	C:\Windows\Logs\CBS\
McxDriv.dll.mui	Media Center Extender Resources	Microsoft® Windows® Operating System (6.0.6000.16386)	8704	C:\Windows\System32\Sysprep\Panther\
WMPhoto.dll.mui	Windows Media Photo Codec	Microsoft® Windows® Operating System (6.1.7600.16385)	2048	C:\WINDOWS\Tasks\
cryptdlg.dll.mui	Microsoft Common Certificate Dialogs	Microsoft® Windows® Operating System (6.1.7600.16385)	4608	C:\WINDOWS\Tasks\
mapistub.dll.mui	Extended MAPI 1.0 for Windows NT	Microsoft® Windows® Operating System (6.2.9200.16384)	52736	C:\Windows\System32\Sysprep\Panther\

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OneX_v1.xsd	XML Schema Definition	Windows 8.1	5957	C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 8	7504	C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 8.1	7548	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows Vista	15591	C:\Windows\L2Schemas\
WLAN_policy_v1.xsd	XML Schema Definition	Windows 7	7405	C:\Windows\L2Schemas\

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